Can't unmount USB volume

[JohnOfArc]

On Sun, 19 Dec 2004 08:54:27 +0100, Laurent CHARLES wrote:

> Hello,
> 
> I'm facing a problem with my newly installed warty on a laptop HP zd7000
> (zd7320ea). I can't unmount USB volume, neither from the gnome desktop,
> nor from the command line.
>   % sudo umount /media/sda1
>   Password:
>   umount: /media/sda1: device is busy
>   umount: /media/sda1: device is busy
>   %
> 
besides the other useful advice RE fam (restarting or purging) and making
sure no other app is accessing the device, try 

umount -l <device> (that almost always works for me)

man umount